Q: Through one of my IMAP accounts, when I try to delete an email, I consistently get the error “Unable to Move Message”. How do I fix this?
A: When the email account was setup on the iPhone, it was already selected to move deleted emails to the local trash folder of the phone. If you are also unable to delete emails on your iPhone, try this. Go inside:
Settings > Mail, Contacts, Calendar > Email Account > Advanced > Deleted Mailbox
Then tap on Trash under on the server, not iPhone, inside the mail account you are using. Repeat these steps for Sent and Drafts. Archive should not be used unless you set this up manually on the server within your Webmail. This should allow you to start deleting emails and using the full benefits of IMAP.